Telkom - Horrible service

I am utterly disgusted with Telkom, as always. In August they cancelled our ADSL with no notice to us. We had to phone to find out that due to cable theft in our area all ADSL services were cancelled. Then they migrated us to wireless broadband and will send the device. It has now been six weeks and still we have not received it. Telkom keeps sending it to our old address in Cape Town where we haven't stayed for the last five years. Then I had to phone again, they made a note and corrected the address and our contact number and still it was sent to Cape Town again. And no one can help or assist, no manager to talk to, no e-mail address to send a complaint. And every time I phone there is a different excuse. It is just shocking that there is no way for me to escalate the problem as no one I speak to can do anything. To what lengths must one go the get a problem resolved?